There are a number of Perl XML parsers that can deal with these lines after they have been extracted from the C code.

Update:
I looked again at the post and I think that the "C" code will not compile because the <DTC>...</DTC> stuff does not look like a comment block to the C compiler. I guess the blocks could be like:

So that the C compiler will see the whole XML doc as a single comment block.

An alternate that is worth considering is Perl POD (Perl Plain Old Documentation) Perl POD. If you organize the "comments" in the C code right, the C compiler will be happy. And the Perl documentation generator will also be happy processing the raw C input file (a "=" as the first character on a line has special meaning). The Perl POD generators will make HTML web pages or man pages directly from the C source file, if the comments /*....*/ are done right.

Hi Marshall,
Thank you very much for your reply.I tried your suggested regex its working. I am very happy with that and i am at learning stage so I got some understanding with your code that extract xml comments. also thank you very much for your suggetion in c code also i rectified that error also. now i am very happy because my problem solved. If incase i have more question on perl programming i will ask you.,because i am working with that.
thank you ,
regards,
veerubiji

Ada Lovelace for the palindrome
Albert Einstein for having smelly feet
Alfred Nobel for his contribution to battlefield science
Burkhard Heim for providing the missing link between science and mysticism
Claude Shannnon for riding a unicycle at night at MIT
Donald Knuth for being such a great organist
Edward Teller for being the template for Dr. Strangelove
Edwin Hubble for pretending to be a pipe-smoking English gentleman
Erwin Schrödinger for cruelty to cats
Hedy Lamarr for weaponizing pianos
Hugh Everett for immortality, especially for cats
Isaac Newton for his occult studies
Kikunae Ikeda for discovering the secrets of soy sauce
Larry Wall for his website
Louis Camille Maillard for discovering why steaks taste good
Marie Curie for the shiny stuff
Nikola Tesla for the cool cars
Paul Dirac for speaking one word per hour when socializing
Richard Feynman for his bongo skills
Robert Oppenheimer for his in-depth knowledge of the Bhagavad Gita
Rusi P Taleyarkhan for Cold Fusion
Sigmund Freud for his Ménage ā trois
Theodor W Adorno for his contribution to the reception of jazz
Wilhelm Röntgen for the foundations of body scanners
Yulii Borisovich Khariton for the Tsar Bomba
Other (please explain why)